/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.addthis.hydra.task.stream;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StringReader;

import com.addthis.basis.io.IOWrap;


public class StreamSourceFileList implements StreamFileSource {

    /**
     * @param sourcelist
     * @throws FileNotFoundException
     */
    public StreamSourceFileList(File sourcelist, int buffer, boolean gz) throws FileNotFoundException {
        reader = new BufferedReader(new InputStreamReader(IOWrap.fileIn(sourcelist, buffer, gz)));
    }

    /**
     * @param filename
     */
    public StreamSourceFileList(String filename) {
        reader = new BufferedReader(new StringReader(filename + "\n"));
    }

    protected StreamSourceFileList() {
    }

    private BufferedReader reader;

    /** */
    @Override public StreamFile nextSource() {
        if (reader != null) {
            try {
                String line = reader.readLine();
                if (line != null) {
                    return new StreamFileNative(new File(line.trim()));
                }
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            reader = null;
        }
        return null;
    }
}
